Don’t know but I think by the time Op met her SO wasn’t any longer sleeping with them, at least I hope so.

Agree. Putting myself in Sabrina’s shoes, would feel and react the same way, especially since Op was still in touch with said friends so who’s to tell that they are still not doing it?

While I was reading thought Sabrina would join the trio but since it’s a tifu post I remembered there won’t be a happy ending ( no pun intended)

I agree, op shouldn’t push the friends away but find a partner who would understand but of course stop sleeping with them and just remain friends